diff --git a/README.textile b/README.textile
index 0a4545bac..078ea1227 100644
--- a/README.textile
+++ b/README.textile
@@ -13,11 +13,11 @@ You can install this via the command line with either `curl` or `wget`.
 
 h4. via `curl`
 
-@curl -L https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh | sh@
+@curl -L https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh | zsh@
 
 h4. via `wget`
 
-@wget --no-check-certificate https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | sh@
+@wget --no-check-certificate https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | zsh@
 
 h3. The manual way
 
diff --git a/tools/install.sh b/tools/install.sh
index a2bd5665a..171e36e71 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -1,3 +1,5 @@
+#!/bin/zsh
+
 if [ -d ~/.oh-my-zsh ]
 then
   echo "\033[0;33mYou already have Oh My Zsh installed.\033[0m You'll need to remove ~/.oh-my-zsh if you want to install"